PFCPFC BLOG
Refinancing Your Mortgage: Costs, Break-Even, and Time Horizon
Learn how closing costs, loan terms, and your time horizon affect refinancing. Compare payment savings with remaining debt using the free PFC calculator.
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A lower mortgage payment can help your monthly budget, but it does not by itself establish that refinancing saves money. The new term, transaction costs, and balance left when you move all affect the comparison. Use the free refinance calculator to put those pieces on the same timeline.
Identify the costs behind the quote
Look at the loan’s interest rate, term, points, lender fees, third-party charges, and lender credits. An offer described as having no closing costs can involve a higher interest rate or costs added to the balance. Ask the lender to explain which mechanism applies before comparing offers.
Source: CFPB: no-cost refinancing.
Payment break-even and total-cost break-even differ
A simple cash-flow check divides cash closing costs by a positive monthly payment reduction. For example, $4,000 divided by $200 is 20 months. That shortcut ignores any difference in remaining loan balances. The PFC calculator instead compares cumulative payments, cash costs, and remaining debt at each month. Its first nonnegative month is specific to that model and the horizon you select.
Try a short and a longer horizon
Assume a $250,000 balance at 7% with 300 months remaining, replaced with a 30-year fixed loan at a hypothetical 6%, and $5,000 closing costs paid in cash. The initial monthly payment reduction is $268.07 in both runs.
| Comparison month | Net refinance savings, including debt |
|---|---|
| 12 | -$2,537.67 |
| 60 | $6,353.76 |
A negative value means refinancing costs more by that month under the assumptions. A positive value means the modeled payments, fees, and remaining balance together cost less. Neither outcome values what the closing-cost cash could have earned elsewhere.
Watch for a term reset
Replacing a loan with 25 years remaining with a new 30-year loan adds five years to the repayment schedule. Test a term close to the remaining term as well as a shorter option, and compare both monthly affordability and the debt remaining at your horizon.
Source: Federal Reserve: mortgage refinancing and term tradeoffs.
Use the refinance calculator guide for input instructions, then compare shorter terms and financed-cost scenarios. This fixed-loan model excludes cash-out, mortgage insurance, taxes, and investment opportunity cost. In particular, an FHA-to-conventional decision needs a separate mortgage-insurance comparison.